[winget] In case on missing winget, the confirmation message is misleading

[marcinotorowski]

In winget editor, after saving a package a validation with Winget CLI is performed. In case of missing winget (not yet installed) the message says that the validation might have failed. This must be resolved in one of the following ways:

a) change the validation message to say that the package could not be validated due to missing winget, or
b) (preferred) skip winget CLI validation if there is no winget on the machine.

The second approach was originally implemented, but seems to be a regression in 2.x.

[marcinotorowski]

Bug with winget detection has been fixed, additionally the following UI changes were done:

After expanding:

Confirmation screen:

[marcinotorowski]

Available in preview build:
https://github.com/marcinotorowski/MSIX-Hero/releases/tag/v2.0.68-pre